US PATENT SUBCLASS 544 / 58.1
.~.~.~.~.~ Double bonded divalent chalcogen containing


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544 /   HD   ORGANIC COMPOUNDS -- PART OF THE CLASS 532-570 SERIES

*  DD  ORGANIC COMPOUNDS (Class 532, subclass 1) {1}
*  DD  .~ HETEROCYCLIC CARBON COMPOUNDS CONTAINING A HETERO RING HAVING CHALCOGEN (I.E., OXYGEN, SULFUR, SELENIUM, OR TELLURIUM) OR NITROGEN AS THE ONLY RING HETERO ATOMS (Class 540, subclass 1) {1}
1  DF  .~.~ Hetero ring is six-membered having two or more ring hetero atoms of which at least one is nitrogen (e.g., selenazines, etc.) {6}
3  DF  .~.~.~ Six-membered hetero ring consists of oxygen, sulfur, nitrogen and carbon (e.g., oxathiazines, etc.) {7}
56  DF  .~.~.~.~ 1,4-thiazines {3}
58.1.~.~.~.~.~ Double bonded divalent chalcogen containing {3}
58.2  DF  .~.~.~.~.~.~> Divalent chalcogen double bonded directly to the thiazine ring
58.4  DF  .~.~.~.~.~.~> Having -C(=X)-, wherein X is chalcogen, bonded directly to the thiazine ring
58.5  DF  .~.~.~.~.~.~> Additional hetero ring containing {2}


DEFINITION

Classification: 544/58.1

(under subclass 56) Compounds which include double bonded divalent chalcogen (i.e., oxygen, sulfur, selenium, or

tellurium).